#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <assert.h>

#define BUF_SIZE 1024


int main(int argc, char *argv[])
{
	int sock;
	char message[BUF_SIZE];
	int str_len;
	struct sockaddr_in serv_adr;
	int ret;
	
	const char* ip="127.0.0.1";
	char* port="9876";

	sock=socket(PF_INET, SOCK_STREAM, 0);   
	assert(sock>=0);

	bzero(&serv_adr,sizeof(serv_adr));
	serv_adr.sin_family=AF_INET;
	serv_adr.sin_addr.s_addr=inet_addr(ip);
	serv_adr.sin_port=htons(atoi(port));
	
	ret=connect(sock, (struct sockaddr*)&serv_adr, sizeof(serv_adr));
	assert(ret>=0);
	puts("Connected...........");
	
	while(1) 
	{
		fputs("Input message(Q to quit): ", stdout);
		fgets(message, BUF_SIZE, stdin);
		
		if(!strcmp(message,"q\n") || !strcmp(message,"Q\n"))
			break;

		write(sock, message, strlen(message));
		str_len=read(sock, message, BUF_SIZE-1);
		message[str_len]=0;
		printf("Message from server: %s", message);
	}
	
	close(sock);
	return 0;
}